Vulnerability Description
The vCenter Server contains a local privilege escalation vulnerability due to the way it handles session tokens. A malicious actor with non-administrative user access on vCenter Server host may exploit this issue to escalate privileges to Administrator on the vSphere Client (HTML5) or vCenter Server vSphere Web Client (FLEX/Flash).
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vmware | Cloud Foundation | >= 3.0, < 3.10.2.2 |
| Vmware | Vcenter Server | 6.5 |
References
- https://www.vmware.com/security/advisories/VMSA-2021-0020.htmlPatchVendor Advisory
- https://www.vmware.com/security/advisories/VMSA-2021-0020.htmlPatchVendor Advisory
FAQ
What is CVE-2021-21991?
CVE-2021-21991 is a vulnerability with a CVSS score of 7.8 (HIGH). The vCenter Server contains a local privilege escalation vulnerability due to the way it handles session tokens. A malicious actor with non-administrative user access on vCenter Server host may exploi...
How severe is CVE-2021-21991?
CVE-2021-21991 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-21991?
Check the references section above for vendor advisories and patch information. Affected products include: Vmware Cloud Foundation, Vmware Vcenter Server.